Final answer:
Joanna exhibits common signs of middle age such as wrinkles, graying hair, and physical declines associated with the natural aging process experienced from the mid-30s to mid-60s.
Step-by-step explanation:
Joanna has all the signs of middle age, including wrinkles, gray hair, decreased vision, reduced strength, lower maximal heart rate, and slowed reaction time. During middle adulthood which extends roughly from the mid-30s to mid-60s, individuals may also experience an increase in abdominal weight, decline in fertility, and a higher risk of developing chronic diseases such as type 2 diabetes, cardiovascular disease, or cancer. These signs are indicative of the natural aging process and can vary widely among individuals.